Has it? The real issue convincing those who are undecided or supportive of Israeli action; it’s less to do with the minority progressives threatening to not vote because everyone knows progressives will hold their nose. But it’s the swing-voter moderates and centrists who are less informed on the issues and easily-swayable by political talking-points — and who make up a far larger chunk of the electorate — that Biden is concerned about. When 1/3 are unsure if Israel is committing genocide and 1/3 say they’re not, that is a problem.